(952) 929 4545
(952) 929 4545
(952) 929 4545
Biocompatibility of Dental Materials
Amalgam Fillings Controversy
Antibiotic Treatment Before Dental Treatment
Root Canal (Endodontic Treatment) Controversy
pH (Acidity) Testing
Appointments & Forms
Holistic & Cosmetic Dentistry
Dr. Sherif Said
In our practice, we strongly believe that it is the patient’s responsibility to make an informed decision regarding their dental health choices. It is our duty to explain all available options to you as well as outline the advantages and disadvantages’ of each.
Because of changing paradigms, controversial issues, and our knowledge of alternative healthcare philosophies, we do not feel it is proper or possible for us to make that choice. Please understand that only you really know what is appropriate based on expectations, healthcare philosophy, time, cost, practicality, and lifestyle.
Dental Material Concepts:
1 Conventional: Except in rare situations, currently used dental materials are safe in the mouth. The important criteria are how durable, natural looking, and practical it is for the dentist and dental laboratory to use.
2 Allerginic: Because some people have allergic reactions to certain substances, the choice of dental materials may have to be limited. Blood tests may be utilized to determine allergenic potential.
3 Toxicity: Some dental materials contain toxic substances which, depending on exposure and other factors, may cause a variety of health problems from resultant dysfunction of the immune system. Non-toxic alternatives should be used to significantly decrease exposure to and accumulation of environmental toxins.
4 Interference Fields: Some dental treatment and materials can be disruptive to the normal flow of energy through the acupuncture meridians. Eastern philosophy believes chronic disruption of energy flow causes dysfunction and resultant health problems.
5 Electrogalvanism: Dissimilar metals in the mouth, including different formulations of the "same" metal, create a small electric current which could cause oral pain, corrosion of the metal, dry mouth, and unpleasant taste.
Existing Types of Dental Materials:
1 Amalgam filling - The most commonly used material for back teeth. It contains approximately 50% mercury, and varying amounts of silver, tin, zinc, and copper. It is the least costly and least time consuming to perform. It expands over time which sometimes causes cracks in the tooth. The controversy is that it contains mercury, a neurotoxin.
2 Galloy filling - A material containing silver, tin, copper, indium, and gallium. It is meant to be a mercury-free alternative to amalgam. Studies of gallium alloys have reported problems with corrosion, durability, tooth fracture, and tooth sensitivity and recommend it for baby teeth only.
3 Gold inlay/onlay - Used when maximum strength is desired and appearance is not a factor. There are many formulations of gold, varying from 1% to 99%. It costs approximately 3-4 times more than an amalgam and takes 2 visits.
4 Titanium inlay/onlay - Used when a gold alloy is not biocompatible, otherwise the benefits, cost, and time to perform are the same as for a gold alloy, even though it is not a precious metal. There are different purities of titanium, with grade 1 being the purest. This is the metal used in joint replacement, dental implants, and bone pins. It takes 2 visits.
5 Non-precious inlay/onlay - Used when cost is the most important factor. There are 2 basic formulations, one that contains nickel and one that is nickel-free. The controversial issue is that nickel, beryllium, and palladium are toxic and may cause health problems in some people.
1 Direct Composite filling - A special plastic material that bonds to tooth structure, is tooth-colored, is more easily repairable, and requires less tooth structure to be trimmed away than any other material.
2 Lab Composite inlay/onlay - Used when ideal anatomy, fit, and durability is desired, which is seldom achieved with a direct composite filling. Cost is approximately 2-3 times that of an amalgam filling and takes 2 visits.
3 Ceramic Optimized Polymer inlay/onlay - Used when the risk of porcelain fractures and wearing down of opposing teeth is to be avoided. Not quite as wear resistant or esthetic as porcelain, but very acceptable.
4 Porcelain inlay/onlay - Used when cosmetics and wear resistance is most important.
- When used in molars, it is significantly more difficult and time-consuming to place than amalgam, and therefore more expensive, from 50-100% more than amalgam.
- They may be less durable than amalgam if the filling is large.
- They are more natural looking, require less tooth reduction, and are bonded in place for a better seal.
- Some brands of composite are less biocompatible than others because of the amount of iron oxide, aluminum oxide, barium, and other unique materials in them. The only exception is Holistore, which has no metal oxides, but as a result is quite white in color and significantly less durable.
- Direct composites occasionally cause tiny hairline cracks in the tooth during the hardening process, however these cracks rarely present a problem.
- Indirect composites are stronger than direct composites, do not crack during the hardening process, but are more expensive.
- For a few weeks or months, they may be more sensitive to cold and chewing than other filling materials.
- It is more natural looking than composite. Many formulations are harder than tooth enamel and as a result, can wear away the teeth it comes in contact with. However, there are newer “soft” porcelains that have the same hardness as tooth enamel.
- All porcelains contain large amounts of metal oxides, especially aluminum oxide. The exception is unshaded belleglass, but it is weaker and not very natural looking.
- The controversy is that it contains more metal oxides than composite.
- Most “gold” alloys used today contain from 1 - 40% gold. Higher gold content alloys increase the cost. Typically, I use 71% or 87% gold alloys in my practice.
- One perspective is that all metals, even non-allergenic or non-toxic metals, are electrically disruptive and therefore should never be used in the body. Still other experts think the use of high quality metals like high content gold or titanium is acceptable but only if one brand and formulation is used for the entire mouth.
- Because of contractual language, statistics, and lack of knowledge, use of titanium, high content gold, and composite for crowns, bridges, or fillings will probably result in lessened or no insurance benefits, even though the time, cost, and effort in making them is the same or more as for standard gold alloy and porcelain materials.
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